Tse Chi Tong (Gallen Lo) was once the heir to a medicine oil factory that was closed more than 10 years ago. He is now dedicated to his work as a postman, and he lives with his younger sister Mei Ling (Annie Man) and his late father's loyal servant Chan Tung (Lo Hoi Pang), whose daughter Yuen Yuen (Shirley Cheung) is in love with him. Tong's peaceful life is changed forever when the ghost of a woman named Mak Chau Kuen (Anne Heung) appears before him one day, telling him her tragic love story and begging him to do one thing for her. Tong vows to help her, and he teams up with sparring rich girl Wong Yuk Cham (Charmaine Sheh) on a quest to find the lost letter from Kuen's beau, Miu Lin Sin (Kwong Wa), from 12 years ago…